Metal-bending machine.



R. ANDERSON. METAL BENDING MACHINE. APPLICATION FILED SEPT. 17, 1910.

Patented Jan. 12, 1915.

THE NORRIS PETERS 60.. PHOTO-LITHOY. WASHINGTON D, C

S PATN ROBERT ANDERSON, F CINCINNATI, OHIO.

METAL-BEN DIN G MACHINE.

Specification of Letters Patent.

Patented Jan. 12, 1915.

Application filed September 17, 1910. Serial No. 582,511.

To all whom it may concern:

Be it known that I, ROBERT, ANDERSON, a citizen of the United Statesof America, and resident of Cincinnati, county of Hamilton,

and State of Ohio, have invented certain new and uesful Improvements in Metal- Bending Machines, of which the following is a specification. I

The object of my invention is a machine,

a which, in a single operation will make two bends at predetermined distances apart in a rod, and will maintain the parts of the rod which come at opposite sides of the bends in parallelism, or other predetermined direction, relatively to each other.

have shown a preferred embodiment of my invention in the accompanying drawing, in which,

Figure 1 is a plan view of so much of a 0 metal bending machine as is necessary to illustrate my invention, the full lines showing the parts in the position they occupy after a rod has been bent, the bent rod being shown in position in full lines, and the dot- 5 ted lines showing the position of the parts prior to the bending of the rod, which is shown in dotted lines in the position it occupies prior to the bending. Fig. 2 is a side elevation of the part shown in Fig. l.

Fig. 3 is a detail view of a rod which has been bent at both ends in the machine, the

operation of bending this rod requiring two ste s.

h dy machine consists of two parallel bars 5 D, D, which are mounted at one end upon fixed pivots, cl, cl, and are coupled together in parallelism by a third bar D which is pivoted to them, so as to permit of their rotation about their pivots, while maintaining their parallel relation to each other, and in two jaws E, E, which receive the bar to be bent, when they are in alinement with each other, and one of which, viz., E, is fixed adjacent to the pivoted ends of the bars, and the other of which is mounted rigidly upon the coupling bar. The parallel bars may be rotated about their pivots, either by hand or by machine.

In the drawings, I have illustrated a mechanism for effecting this rotation and for throwing off the power after the bars have been rotated through a predetermined number of degrees.

Fixed frame A has secured upon it 2. cy-

5 lindrical housing, a, within which is a rotatable gear wheel B, which is mounted upon the shaft which forms the pivot d.

Gear wheel B intermeshes with theworm wheel F, which is mounted upon the actuating shaft f. Gear wheel, B, has an upwardly projecting hub, b, to the upper end of which D is secured, so that the jaw, D, is rotated by the gear wheel, B.

Fixed jaw E is secured upon a standard a,which projects upward from the housing and has projecting at right angles from it a fixed bar D at the outer end of which the pivot (Z is secured. The bar D has the jaw E secured to it at right angles and braced by brace rod, 6.

Bar D has projecting from its opposite ends pivot pins (Z (Z which are adapted to enter any one of the series of perforations d which occur in the bars D, D, and to maintain the bars in parallelism.

Jaws E, E, have longitudinal grooves 6 e in which the rod to be bent is laid when these grooves are brought into alinement with each other.

Sliiaft f may be rotated by any means desire K is a rod for throwing a clutch for throwing off the power, when the stop 76 is contacted by the arm F, which is secured upon the pivot or shaft (5.

represents an arm for throwing in the power to start the machine. The means of actuating the shaft 7, the clutch which is moved by the rod in, and the means which is actuated by the rod H for throwing in the power, are all illustrated in United States Letters Patent No. 947,288, granted to The F erro Concrete Construction Company on January 25th., 1910, said parts being designated by the same reference letters herein as in said patent.

In operation :-The jaw E into alinement with the jaw E, by rotating the bars D, D, the rod, G, to be bent is laid in the grooves e 6 then the bars D, D, are rotated about the pivots d, d.

Since the frame consisting of the bars D, D, D D form in effect a parallel ruler, the jaw E maintains a direction parallel to the jaw E, thus, the parts of the rod held within the jaws are kept parallel to each other, while the part of the rod between the jaws, is bent at an angle thereto, the degree of the angle depending upon the degrees of rotation through which the bars D, D, are

being brought moved. hen the machine is actuated by power, the number of degrees through which the bars D, D, rotate about their pivots may be fixed by the adjustment of the stop is upon the rod K, so that after moving through a fixed number of degrees, the rod F throws out the clutch and cuts off the power.

The length of the part of the bent rod adjoining the parallel portions thereof, may be regulated'by adjustment of the bar D toward and from the bar D To get a rod of" the form shown inFig. 3, after .oneend has been bent in the manner'just' described, andthe jaw E has been brought back into alineinent with the jaw E,the rod is reversed and the opposite end is placed in the jaws, and the parts are rotated, as aforedescribed, to obtain the second or reversed bendin the rod.

Inthe drawings,- the grooves in have been made to fit the rod snugly, but the groovesmay be larger than the rod, provided. the two-jawsE, E, be made equalin length. s

the jaws- 1. In a machine for bending a metal rod, the combinationof two bars, pivots at one end of thebars, ajawfixed adjacent to the pivoted ends. of the bars, a third bar pivoted at its ends to the two bars and adapted to permit rotation of the bars around their pivots, adjustable means for pivoting the third bar to-thesaid two bars, and a jaw secured to the third bar, the jaws being adapted to hold the rod tobe bent.

2. A bending apparatusv comprising two hOl'dersforthe reception'of the article to be bent, and movable meansfbywhich one of said holders may be moved i in" an .arcuate path and kept parallelwith the other holder during its .movement, the said movable means comprisinga pair of parallelpivotal rods, meinbers adjustably mounted on the rods, and a carrier'for said 'movableholder pivoted T to said adjustable members.

ROBERT ANDERSON.

Witnesses: G. P. rB-ARTn, BERTHA'iR. KRoPF.

Copies-of this patent, may beon'tained for'fi've cents each,;by addressing the Gonimisflqner. of Patents,

.Washington, D. G. 

